Ablock of mass m is attached to ideal spring of constant k. when the spring is neither stretched nor compressed, block is at the equilibrium position (x = 0).
assume the force between the mass and the spring obeys hooke’s law: fs = - kx, where x is the displacement and fs is the restoring force. the restoring force is always directed toward the equilibrium position. in this example of vibrational motion, the restoring force illustrates newton's